Invensys Wonderware Releases New ABCIP DAServer
New Version Offers ControlLogix® Support

LAKE FOREST, Calif., April 7, 2003 -- Wonderware, an operating unit of Invensys plc, today announced the release of a new and enhanced DataAccessServer (DAServer) supporting Rockwell ControlLogix® controllers.

DAServers are Wonderware's next-generation I/O servers and a significant part of Wonderware's FactorySuite A²™ product family, an extension of the existing FactorySuite® product line. The "A²" signifies Invensys' ArchestrA™ automation and information software architecture.

Wonderware's DAServers are built on the ArchestrA architecture and offer enhanced communication diagnostics and performance. Each DAServer is designed to provide connectivity between client applications based on Wonderware's SuiteLink™ protocol and OPC® and DDE protocols running on the Microsoft Windows® 2000 and Microsoft XP™ operating systems, as well as data devices supported by the specific protocol being translated.

Wonderware's ABCIP DAServer v1.2 retains the extensive functionality of its earlier ABCIP DAServer v1.1 release but adds support for ControlLogix user-defined structures.

About Wonderware

Wonderware is an operating unit of the Production Management Division (PMD) of Invensys plc and is the world's leading supplier of industrial automation software. Founded in 1987, Wonderware pioneered the use of the Microsoft Windows operating system in HMI automation software for manufacturing operation systems. Its mission is to power intelligent plant decisions in real time.

Based in Lake Forest, Calif., Wonderware has regional sales and development offices throughout North America, Europe, Latin America and Asia to provide support to its network of more than 160 distributor offices. Wonderware has approximately 300,000 licenses in 100,000 plants worldwide, which is about 30 percent of the world's 335,000 plants with 20 or more employees.

About Invensys

Invensys plc is a global leader in production technology and energy management. The group helps customers to improve performance and profitability using innovative services and technologies and a deep understanding of industries and applications.

The Invensys Production Management businesses work closely with customers in order to drive up performance of production assets, maximize the return on investments in production technologies and remove cost and cash from the whole supply chain. The division includes APV, Avantis, Eurotherm, Foxboro, SimSci-Esscor, Triconex and Wonderware. These businesses address process and batch industries -- including the oil, gas and chemicals, food, beverage and personal healthcare -- and the discrete and hybrid manufacturing sectors.

Invensys Energy Management works with clients involved in the supply, measurement and consumption of energy and water, to reduce costs and waste and improve the efficiency, reliability and security of power supply. The division includes Energy Management Solutions, Appliance Controls, Climate Controls, Global Services, Metering Systems, Powerware and Home Control Systems. These businesses focus on markets connected with power and energy infrastructure for industrial, commercial and residential buildings.

The company also serves the specialized rail, wind-power and electronic manufacturing (power components) markets through Invensys Rail Systems, Hansen Transmissions and Lambda, respectively, in its Development Division.

Invensys operates in more than 80 countries, with its headquarters in London. For more information, visit www.invensys.com.

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Invensys, Wonderware, ArchestrA, FactorySuite, FactorySuite A2 and SuiteLink are trademarks of Invensys plc, its subsidiaries and affiliated companies. All other brands may be trademarks of their respective owners.